Sexy model Charlotte McKinney was BY HERSELF at Nobu Malibu on a Friday night?! Boyfriend Stephen Dorff better watch it!

McKinney strutted her stuff in a sexy LBD, nude heels and olive green bomber - but SHE was the bomb! The blonde beauty was recently hired by Guess to front the denim brand's campaign -- a coveted gig for a supermodel. And not bad at all for a high-school drop-out.

She's got some more high-profile gigs in the pipeline, too - next year, she'll strut her stuff in a red bathing suit for the Baywatch remake with Dwayne Johnson, Zac Efron, Pamela Anderson, and David Hasselhoff.

First, though, the former Dancing With the Stars contestant will star in The Late Bloomer - in theaters this fall.